Electronic Compass Module Programming And Setup
WARNING: This page is about a different car, the 2011 GMC Savana and 2011 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
The electronic compass module requires a calibration after the module is replaced, repaired, or as required for proper module operation. Refer to Compass Calibration and Magnetic Variance (without OnStar Only) .